EP0825713A3 - Differential input and/or differential output transversely-coupled surface acoustic wave filter and method - Google Patents

Differential input and/or differential output transversely-coupled surface acoustic wave filter and method Download PDF

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Publication number
EP0825713A3
EP0825713A3 EP97113082A EP97113082A EP0825713A3 EP 0825713 A3 EP0825713 A3 EP 0825713A3 EP 97113082 A EP97113082 A EP 97113082A EP 97113082 A EP97113082 A EP 97113082A EP 0825713 A3 EP0825713 A3 EP 0825713A3
Authority
EP
European Patent Office
Prior art keywords
acoustic wave
group
couples
surface acoustic
wave filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97113082A
Other languages
German (de)
French (fr)
Other versions
EP0825713A2 (en
Inventor
Donald Eugene Allen
Jeffrey Thomas Mink
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CTS Corp
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of EP0825713A2 publication Critical patent/EP0825713A2/en
Publication of EP0825713A3 publication Critical patent/EP0825713A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/0023—Balance-unbalance or balance-balance networks
    • H03H9/0028—Balance-unbalance or balance-balance networks using surface acoustic wave devices
    • H03H9/0047—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks
    • H03H9/0052—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks being electrically cascaded
    • H03H9/0057—Balance-unbalance or balance-balance networks using surface acoustic wave devices having two acoustic tracks being electrically cascaded the balanced terminals being on the same side of the tracks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • H03H9/644—Coupled resonator filters having two acoustic tracks
    • H03H9/6456—Coupled resonator filters having two acoustic tracks being electrically coupled
    • H03H9/6459—Coupled resonator filters having two acoustic tracks being electrically coupled via one connecting electrode
    • H03H9/6463—Coupled resonator filters having two acoustic tracks being electrically coupled via one connecting electrode the tracks being electrically cascaded

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

A method for making an acoustic wave device (500, 600, 701, 801, 901, 1001), and an acoustic wave device (500, 600, 701, 801, 901, 1001) made by the method. The method comprises steps of providing a substrate (11) capable of supporting acoustic wave propagation and disposing a first transducer (518, 518') thereon. Disposing the first transducer (518, 518') includes disposing first through fourth electrode groups on the substrate. The first group (514') couples to a first electrical interconnection (17+). The second group (514'') couples to a second electrical interconnection (17-). The third group (519) couples to a common electrical interconnection (17') and is interleaved with the first group (514') of electrodes. The fourth group (520) couples to the common electrical interconnection (17') and is interleaved with the second group (514''). The fourth group (520) is disposed in an in-line configuration with the third group (519) and is offset therefrom by an integral number of half-wavelengths of an acoustic wave corresponding to a center frequency of the acoustic wave device (500, 600, 701, 801, 901, 1001).
EP97113082A 1996-08-12 1997-07-30 Differential input and/or differential output transversely-coupled surface acoustic wave filter and method Withdrawn EP0825713A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US689451 1985-01-07
US08/689,451 US5793266A (en) 1996-08-12 1996-08-12 Differential input and/or differential output, transversely-coupled surface acoustic wave filter

Publications (2)

Publication Number Publication Date
EP0825713A2 EP0825713A2 (en) 1998-02-25
EP0825713A3 true EP0825713A3 (en) 1998-09-16

Family

ID=24768528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97113082A Withdrawn EP0825713A3 (en) 1996-08-12 1997-07-30 Differential input and/or differential output transversely-coupled surface acoustic wave filter and method

Country Status (3)

Country Link
US (1) US5793266A (en)
EP (1) EP0825713A3 (en)
JP (1) JPH1093388A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2739232B1 (en) * 1995-09-26 1997-10-24 Thomson Csf SURFACE ACOUSTIC WAVE FILTER USING THE COUPLING OF THREE ACOUSTIC CHANNELS
GB2306821B (en) * 1995-11-03 2000-05-31 Advanced Saw Prod Sa Electro-acoustic device
DE69737555T2 (en) * 1996-05-23 2007-08-09 Matsushita Electric Industrial Co., Ltd., Kadoma Acoustic surface acoustic wave filter and multi-level surface acoustic wave filter
US6801100B2 (en) * 1996-05-23 2004-10-05 Matsushita Electric Industrial Co., Ltd. Inter-digital transducer, surface acoustic wave filter and communication apparatus using the same
US6348845B2 (en) 1996-05-23 2002-02-19 Matsushita Electric Industrial Co., Ltd. Surface acoustic wave filter and multistage surface acoustic wave filter
JP3239064B2 (en) * 1996-05-28 2001-12-17 富士通株式会社 Surface acoustic wave device
FR2762458B1 (en) * 1997-04-18 1999-07-09 Thomson Csf SURFACE ACOUSTIC WAVE DEVICE HAVING PROXIMITY COUPLING WITH DIFFERENTIAL INPUTS / OUTPUTS
JP3253568B2 (en) * 1997-08-29 2002-02-04 富士通株式会社 Multi-stage surface acoustic wave filter
JPH11340774A (en) * 1998-05-26 1999-12-10 Murata Mfg Co Ltd Surface acoustic wave filter
JP2000244275A (en) * 1999-02-19 2000-09-08 Murata Mfg Co Ltd Saw resonator filter
JP3391346B2 (en) 2000-04-18 2003-03-31 株式会社村田製作所 Vertically coupled resonator type surface acoustic wave filter
JP3402311B2 (en) * 2000-05-19 2003-05-06 株式会社村田製作所 Surface acoustic wave device
JP4411539B2 (en) * 2005-08-25 2010-02-10 セイコーエプソン株式会社 SAW resonator
US20230009576A1 (en) * 2021-07-06 2023-01-12 Skyworks Solutions, Inc. Surface acoustic wave resonator with modulated pitch

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05183372A (en) * 1991-12-26 1993-07-23 Toshiba Corp Surface acoustic wave device
EP0576340A1 (en) * 1992-06-26 1993-12-29 Thomson-Csf Surface wave filter with reflective arrays
EP0600705A1 (en) * 1992-12-01 1994-06-08 Japan Radio Co., Ltd Surface acoustic wave filter and mobile communication system using same
US5365138A (en) * 1993-12-02 1994-11-15 Northern Telecom Limited Double mode surface wave resonators
EP0648015A2 (en) * 1993-10-08 1995-04-12 Matsushita Electric Industrial Co., Ltd. Surface acoustic wave filter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59131213A (en) * 1982-07-26 1984-07-28 Toyo Commun Equip Co Ltd High frequency and narrow band multiple mode filter
FR2658013B1 (en) * 1990-02-02 1992-04-17 Thomson Csf SURFACE ACOUSTIC WAVE FILTER.
FR2661292B1 (en) * 1990-04-24 1995-07-21 Thomson Csf LOW LOSS SURFACE WAVE FILTER.
US5265267A (en) * 1991-08-29 1993-11-23 Motorola, Inc. Integrated circuit including a surface acoustic wave transformer and a balanced mixer
FR2682833B1 (en) * 1991-10-18 1993-12-03 Thomson Csf SURFACE WAVE FILTER WITH FOLDED ACOUSTIC PATH.
JP3369581B2 (en) * 1991-11-01 2003-01-20 株式会社東芝 Multistage multimode filter and surface acoustic wave filter device
JP3244386B2 (en) * 1994-08-23 2002-01-07 松下電器産業株式会社 Surface acoustic wave device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05183372A (en) * 1991-12-26 1993-07-23 Toshiba Corp Surface acoustic wave device
EP0576340A1 (en) * 1992-06-26 1993-12-29 Thomson-Csf Surface wave filter with reflective arrays
EP0600705A1 (en) * 1992-12-01 1994-06-08 Japan Radio Co., Ltd Surface acoustic wave filter and mobile communication system using same
EP0648015A2 (en) * 1993-10-08 1995-04-12 Matsushita Electric Industrial Co., Ltd. Surface acoustic wave filter
US5365138A (en) * 1993-12-02 1994-11-15 Northern Telecom Limited Double mode surface wave resonators

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 599 (E - 1455) 2 November 1993 (1993-11-02) *
SHARIF M A ET AL: "Coupled resonator filters with differential input and/or differential output", 1995 IEEE ULTRASONICS SYMPOSIUM. PROCEEDINGS. AN INTERNATIONAL SYMPOSIUM (CAT. NO.95CH35844), 1995 IEEE ULTRASONICS SYMPOSIUM. PROCEEDINGS. AN INTERNATIONAL SYMPOSIUM, SEATTLE, WA, USA, 7-10 NOV. 1995, ISBN 0-7803-2940-6, 1995, NEW YORK, NY, USA, IEEE, USA, pages 67 - 70 vol.1, XP002072572 *

Also Published As

Publication number Publication date
EP0825713A2 (en) 1998-02-25
JPH1093388A (en) 1998-04-10
US5793266A (en) 1998-08-11

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